| Cerebral blood flow and behavioural effects of caffeine in habitual and non-habitual consumers of caffeine: A near infrared spectroscopy study. | |
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MedLine Citation:
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PMID: 21262317 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Caffeine has been shown to modulate cerebral blood flow, with little evidence of tolerance to these effects following habitual use. However, previous studies have focused on caffeine levels much higher than those found in dietary servings and have compared high caffeine consumers with low consumers rather than 'non-consumers'. The current placebo-controlled double-blind, balanced-crossover study employed near infrared spectroscopy to monitor pre-frontal cerebral-haemodynamics at rest and during completion of tasks that activate the pre-frontal cortex. Twenty healthy young habitual and non-habitual consumers of caffeine received 75mg caffeine or placebo. Caffeine significantly decreased cerebral blood flow but this was subject to a significant interaction with consumption status, with no significant effect being shown in habitual consumers and an exaggerated effect in non-habitual consumers. These findings suggest that caffeine, at levels typically found in a single dietary serving, is able to modulate cerebral blood flow but these effects are subject to tolerance. |
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Authors:
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David O Kennedy; Crystal F Haskell |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-1-22 |
Journal Detail:
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Title: Biological psychology Volume: - ISSN: 1873-6246 ISO Abbreviation: - Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2011-2-3 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0375566 Medline TA: Biol Psychol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011. Published by Elsevier B.V. |
Affiliation:
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Brain, Performance and Nutrition Research Centre, Northumbria University, Newcastle-upon-Tyne, NE1 8ST, UK. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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